middleware.js

const Listing = require("./models/listing");
const Review = require("./models/review.js");
const ExpressError = require("./utils/ExpressError.js");
const { listingSchema , reviewSchema} = require("./schema.js");
const review = require("./models/review.js");

module.exports.isLoggedIn = (req,res,next)=>{
    if(!req.isAuthenticated()){
        // redirectUrl save karo
        req.session.redirectUrl = req.originalUrl;
        req.flash("error","You have to log-in first");
        return res.redirect("/login");
    }
    next();
}

module.exports.saveRedirectUrl = (req,res,next)=>{
    if(req.session.redirectUrl){
        res.locals.redirectUrl = req.session.redirectUrl; // here i m saving the redirectUrl into locals var
    }
    next();
};

module.exports.isOwner = async(req,res,next)=>{
    let { id } = req.params;
    let listing = await Listing.findById(id);
    if(!listing.owner.equals(res.locals.currUser._id)){
        req.flash("error","You don't have the permission to do this 🫵🏻");
        return res.redirect(`/listings/${id}`);
    }
    next();
}

module.exports.validateListing = (req, res, next) => {
    let {error} = listingSchema.validate(req.body);
    if(error) {
        let errMsg = error.details.map((el) => el.message).join(",");
        throw new ExpressError(400, errMsg);
    } else{
        next();
    }
};

module.exports.validateReview = (req,res,next)=>{
    let {error} = reviewSchema.validate(req.body);
    if(error){
        let errMsg = error.details.map((el)=>el.message).join(",");
        throw new ExpressError(400,errMsg);
    } else {
        next();
    }
};

module.exports.isReviewAuthor = async(req,res,next)=>{
    let { id, reviewId } = req.params;
    let review = await Review.findById(reviewId);
    if(!review.author.equals(res.locals.currUser._id)){
        req.flash("error","You are not the author of this Review 🫵🏻");
        return res.redirect(`/listings/${id}`);
    }
    next();
}